Answer:

Step-by-step explanation:
<h2><em>What is a Triangle?</em></h2>
<em>A triangle is the simplest polygon. It is a two-dimensional shape with three straight sides forming an interior, closed space. It has three interior angles. </em>
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<em>1. Subtract the two known angles from 180° </em>
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<em>2. Plug the two angles into the formula and use algebra: </em>
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3. Subtract



<em><u>Therefore, The Answer is 50</u></em>
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